Storage unit



FIG. 1 is a front perspective view of a storage unit;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, the side opposite being substantially a mirror image;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is top elevational view thereof; and

FIG. 6 is a bottom elevational view thereof. 

The ornamental design for a storage unit, as shown and described. 